Question

52 u of helium contains______ atoms​

Answer 1

Explanation:

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=7.8286 × 10^24. In 52 u of He 7.8286 × 10^24 atoms are present.

Answer 2

Explanation:

Molar mass of He=4u

Given mass of He=52u

Moles of He= 52/4

=13 mol

Since 1 mole of He contains 6.023×10 to the power of 23 atoms.

∴ No. of atoms in 52u of He=13×6.023×10 to the power of 23 atoms.